Electro Hardware JAX107M12F21A Jack Screw 4-40 Zinc Steel

Product Description

The ELECTRO HARDWARE JAX107M12F21A is a 4-40 threaded jack screw used to secure panel-mount connectors and electronic assemblies. Machined from Grade 2 steel with a zinc plating for corrosion resistance, this fastener features a hex head measuring 3/16 inches across flats and a head height of 3/16 inches. Thread length is 9/16 inches with a thread depth of 0.1 inches and a Class 2A/2B fit for standard tolerance applications. Each unit ships with one lock washer, one nut, and two flat washers, making it a ready-to-install hardware kit for technicians working with D-sub connectors and panel-mount components.

This jack screw is suited for use in electronics assembly, control panel fabrication, and enclosure connector installations. It is commonly installed in HVAC control boards, electrical enclosures, and industrial panel assemblies where 4-40 threaded standoffs or D-sub connector hardware is required. The included hardware kit supports direct installation without the need to source additional mating fasteners. Meets fastener standard QQ-S-633. Minimum order quantity is 50 pieces.

Key Features

• 4-40 thread size with 9/16 inch thread length for standard D-sub and panel-mount connector applications
• Hex head design, 3/16 inches across flats, compatible with standard hex drivers and wrenches
• Grade 2 steel construction with zinc plating for corrosion resistance
• Thread fit class 2A (external) / 2B (internal) for standard tolerance mating
• Includes one lock washer, one nut, and two flat washers per unit
• Meets fastener standard QQ-S-633

Compatibility

Designed as an OEM-style replacement or new-installation fastener for 4-40 threaded panel-mount and D-sub connector applications in electronic enclosures and control panels.

Installation Notes

Installation is typically performed by electronics technicians or electricians during control panel assembly or connector service. Power down all affected circuits before handling internal panel hardware. Use a properly sized hex driver or wrench sized for 3/16 inch across flats to avoid rounding the head. Do not overtighten, as Grade 2 fasteners at this thread size have limited torque capacity.